Molecules,
Journal Year:
2020,
Volume and Issue:
25(14), P. 3167 - 3167
Published: July 10, 2020
Soil
contamination
by
heavy
metals
threatens
the
quality
of
agricultural
products
and
human
health,
so
it
is
necessary
to
choose
certain
economic
effective
remediation
techniques
control
continuous
deterioration
land
quality.
This
paper
intended
present
an
overview
on
application
biochar
as
addition
heavy-metal-contaminated
soil,
in
terms
its
preparation
technologies
performance
characteristics,
mechanisms
effects,
impacts
metal
bioavailability.
Biochar
a
carbon-neutral
or
carbon-negative
product
produced
thermochemical
transformation
plant-
animal-based
biomass.
shows
numerous
advantages
increasing
soil
pH
value
organic
carbon
content,
improving
water-holding
capacity,
reducing
available
fraction
metals,
crop
yield
inhibiting
uptake
accumulation
metals.
Different
conditions,
such
biomass
type,
pyrolysis
temperature,
heating
rate
residence
time
are
pivotal
factors
governing
characteristics
biochar.
Affected
dissolved
ash
content
biochar,
interaction
between
mainly
includes
complexation,
reduction,
cation
exchange,
electrostatic
attraction
precipitation.
Finally,
potential
risks
in-situ
strategy
expounded
upon,
which
provides
directions
for
future
research
ensure
safe
production
sustainable
utilization
